Extreme Speed Prop Planes Discuss the need for speed with fast prop planes (Screamin Demon, Diamond Dust, Shrikes or any REAL sound breakin'''' plane)

Balsa USA Force One - Help needed

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Old 05-28-2006, 01:37 PM
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Strykaas
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Default Balsa USA Force One - Help needed

Hi all

I am now working on my Force One , and something caught my eye.
On all the Force One I have seen here on RCU, the main landing gear is bent forward.
However, as per the plan sold with the kit, the mains are bent rearwards, which will in my opinion make the take off roll much longer.
What do you think ? Shall I bend a new set of mains ? Or maybe just swap them ?
Is the lg spar located at the same place on yours ? What is important is the wheel location, so please could you check on yours ? Maybe there has been several revisions of this kit with the wheels always at the same place, but different lg spars setup...

Here is a close up shot of the mains from my plan :

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Old 05-28-2006, 07:45 PM
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rmenke
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Default RE: Balsa USA Force One - Help needed

Bro Strakaas:

If its a tail dragger, kick forward for sure. If trike, kick backward and adjust nose wheel to level out. Should not make any difference in takeoff distance regardless. ENJOY Bro 119
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Old 05-29-2006, 05:53 AM
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Default RE: Balsa USA Force One - Help needed

It's a trike, a tail dragger can't work because of that center prop ...

OK I will let it as per plan. thx
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Old 05-29-2006, 09:22 AM
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Default RE: Balsa USA Force One - Help needed

ORIGINAL: Strykaas


What do you think ?

Seeing you have not been overwhelmed with responses.

Deltas take a high angle of attack to make lift, so to takeoff you really have to rotate the nose up. There's two things at work here:

1. You have to worry about a prop strike when you rotate for takeoff.
2. Deltas have very little leverage with their elverons, so you want the plane to have the wheels very close to the CG, but behind it.

From looking at the plans you provided, I would say you could take the stock LG and mount them on the opposite sides, which would move the wheels forward, and make it easier to rotate for take off, but you might want to use a 3 bladed pusher prop so you have a little more ground clearance.
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Old 05-29-2006, 09:51 AM
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Default RE: Balsa USA Force One - Help needed

Don't deviate from the plans. The mains also support the weight of the motor. Mine are facing "rearward" and the approx distance from the front hub to the rear hub is 14".

Good luck,

Gary
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Old 05-30-2006, 02:49 PM
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Default RE: Balsa USA Force One - Help needed

ORIGINAL: soarrich
1. You have to worry about a prop strike when you rotate for takeoff.
No problem, I will use some kind of wire or clear plastic sheet at the very rear end to avoid any.

ORIGINAL: soarrich
2. Deltas have very little leverage with their elverons, so you want the plane to have the wheels very close to the CG, but behind it.
From looking at the plans you provided, I would say you could take the stock LG and mount them on the opposite sides, which would move the wheels forward, and make it easier to rotate for take off, but you might want to use a 3 bladed pusher prop so you have a little more ground clearance.
This is the opposite of what Airgar said ... Did you fly one ?
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Old 05-30-2006, 02:53 PM
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Default RE: Balsa USA Force One - Help needed

ORIGINAL: AirGar

Don't deviate from the plans.
Mhhhh... only for the LG

ORIGINAL: AirGar
The mains also support the weight of the motor. Mine are facing "rearward" and the approx distance from the front hub to the rear hub is 14".
Exactly. I've rechecked the pix of the "Panty bandit", and yep, facing rearwards. I'll go that route.


But : ...
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Old 05-30-2006, 03:08 PM
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Default RE: Balsa USA Force One - Help needed

ORIGINAL: Strykaas

ORIGINAL: soarrich
2. Deltas have very little leverage with their elverons, so you want the plane to have the wheels very close to the CG, but behind it.
From looking at the plans you provided, I would say you could take the stock LG and mount them on the opposite sides, which would move the wheels forward, and make it easier to rotate for take off, but you might want to use a 3 bladed pusher prop so you have a little more ground clearance.
This is the opposite of what Airgar said ... Did you fly one ?
No, but I have 2 DD, BTE Votex, and several homebrew deltas. It's only the opposite in that I say put the stock gear on backward, he said as the plans say, try both, it's a 10 minute change to swap them around. I think you'll fine it takes off better my way. If the eleverons have to overcome more weight, (stock configuration), you'll have to be going faster.

Check this out. http://www.rcuniverse.com/product_gu...cfm?kit_id=998

If you try it both ways let us know which you like.
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Old 05-30-2006, 04:55 PM
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Default RE: Balsa USA Force One - Help needed

Thanks Rich for posting.

I agree with you, and just as I stated in my first post, a quick swap is easy to do... But that won't be possible for me (mods), I have to decide now !

Actually you may be 100% right , and that's also why I've started this thread. I have checked a french mag Force One plan reportedly based on RCM plan. We can even see the RCM logo which has been left on the french plan. Guess what, on this plan, the mains are facing forward [X(]... So the question is, which plan is the latest version ? My plan (from the kit) has the mains bent rearwards, and a version sold by RCM features the mains bent forward.

I will shoot a picture of my french mag tomorrow for you to see. Hard to say which one is the latest design. My kit was bought one year ago only, so I would tend to say it is newer, bu who knows ?

Airgar, how much take off roll do you get with your setup ?
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Old 05-31-2006, 07:12 AM
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Default RE: Balsa USA Force One - Help needed

ORIGINAL: Strykaas

Airgar, how much take off roll do you get with your setup ?
Haven't flown it for awhile, but it seems to me 'bout 150', or less.
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Old 05-31-2006, 07:36 AM
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Default RE: Balsa USA Force One - Help needed

I have a friend with one, and the only thing i would like to add is to make sure the nose does sit with a positive attitude or it will not get off the ground. His took like said about 150' to lift, that is once he had the nose at the positive attitude.
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Old 06-01-2006, 12:54 AM
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Default RE: Balsa USA Force One - Help needed

My mains are rearward and it leaps into the air after a 60 foot roll. As mentioned above, do have slight nose up positive attitude about 2 degrees is all it takes, too much and it won't stay planted on landings. Note; make sure your canopy screw is secure, mine came out and the whole canopy went though the prop ( kinda sounded like a tree shredder).
Balsa and monocoat confetti in the sky, the rest of the plane landed fine engine on with some minor damage around the prop slot area.
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Old 06-04-2006, 10:44 AM
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Default RE: Balsa USA Force One - Help needed

Here it is guys. This accounts for a big difference ! What do you think ?

Till now, we've only heard people with mains facing rearwards [:-]. BTW where did you get yours from ? Balsa USA kit ? RCM plan ? or ... ? And when ?


Thx
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Old 06-04-2006, 12:29 PM
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Default RE: Balsa USA Force One - Help needed

Pictures of modded Force Ones I have found in my RC mag ... Would love to see the pulsejet version in action
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Old 06-04-2006, 12:38 PM
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Default RE: Balsa USA Force One - Help needed

One more, sleek nose [:-]
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Old 04-05-2007, 04:09 PM
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Default RE: Balsa USA Force One - Help needed

The main landing gear is suppose to be bent forward as per original RCM plans.
Laddie.
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Old 04-05-2007, 04:28 PM
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Default RE: Balsa USA Force One - Help needed

Thank you Laddie. I infer from what you've said that Balsa USA has modified the design ?
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